Petroleum-lamp.



PATENTED OCT. 13, 1903,

S. UARLSON. PETROLEUM LAMP. APPLIOATIONI 1 11.31) FEB. 1B, 1902.

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the. 741,22e.

iatented October 13, 1963'.

PATENT Prion,

SVEN CARLSON, OF STOCKHOLM, SWEDEN.

PETROLEUM-LAiVlP.

SPECIFICATION forming part of Letters Patent No. 741,223, dated October13, 1903. Application filed February 18, 1902. Serial No. 94,674. (Nomodel.)

To aZZ whmn it may concern:

Be it known that I, SVEN GARLsON, doctor of philosophy, ofValhallavz'igen 93, Stockholm,

in the Kingdom of Sweden, do hereby declare the nature of my inventionfor Improvements in Petroleum-Lamps, and in what manner the same is tobe performed, to be particularly described and ascertained in and by thefollowing statement.

The invention has for its object a device which admits of storing alarge quantity of petroleum in the reservoir of street-lamps( and likeapparatus) where petroleum is forced to the burner by means of acompressed gasas, for instance, carbonic acid-which is discharged from aspecial holder through the means of a pressure-reducing valve. Bysupplying the petroleum-reservoir with a large quantity of petroleum atonce the advantage is gained that refilling need not take place atfrequent intervals, it being, for instance, possible to provide such alamp with its supply of oil for a whole year.

In the drawings, Figure 1 is a sectional elevation, and Fig. 2 is adetail view.

The improvement consists in arranging in the base a of the lamp-post,which base serves as a main petroleum-reservoir, a smaller supplementalclosed reservoir 1), provided with a valve 0, which opens inward and iskept open as long as the pressure in the inner reservoir does not exceedthat in the outer one. This valve 0, as illustrated in Fig. 2, consistsof a casing 1," in which is fixed a diaphragm 2, with a central sleeve3, which at some distance surrounds a valve-plu g 4 and normally isdepressed by a spring 5 in such a manner that normally the passagebetween the sleeve and the plug is open. The plug supports a sieve 6,above which is placed a perforated cover '7. Normally the sleeve and thediaphragm are depressed by the spring, thus permitting the petroleum topass from the reservoir a to the reservoir 1) through the cover, thesieve, and the passage between the plug and the sleeve; but as soon asthe compressed gas through the pipe (Z is introduced into the reservoirbthe diaphragm is raised and also the sleeve, the upper edge of whichthereby is pressed against the head of the plug, thus closing thepassage for the petroleum. The

reservoir 19 is connected by a pipe d with the chamber 6, inclosing thereducing-valve, this reducing valve being of any suitableconstruction-as, for example, that described in my former patent, No.714,1e-3, of the 25th of November, 1902and by means of another pipe fwith the burner. g is the holder for the compressed gas. Normally thevalve 0, as mentioned, is open, so that petroleum from the reservoir tocan pass into the reservoir Z) and fill it; but if the reducing-valve beopened by turning the screw h, so that compressed gas escapes, thelatter will pass through the pipe cl to the reservoir Z) and closing thevalve 0 Will force the petroleum in the reservoir 1) upward through thepipe f to the burner, where it evaporates and is ignited in knownmanner. As long as the lamp burnsthat is, as long as the pressure in thereservoir b exceeds the normalthe valve 0 is kept closed; but if thisexcess of pressure be suspended by closing the reducing-valve the valve0 will be opened and a fresh quantity of petroleum admitted to thereservoir b. The gas in the pipe d and the reservoir 1) is brought intoconnection with the open air (on account of the construction of thereducing -valve) when the said valve is closed.

By this device the advantages are further gained that it is notnecessary to make the large reservoir to strong enough to resist thepressure of the compressed gas, said pressure merely acting in thesmaller reservoir Z), and that the clearance-space (or wastezspace) willbe small. Were the small reservoir 1) disj pensed with and the pressureallowed to act directly on the petroleum in the reservoir a, anincreasing quantity of compressed gas would evidently be required,according as the contents of the said reservoir is consumed, for fillingthe space above the petroleum in this reservoir and producing thepressure in it, and this space may become considerably larger, moreespecially when the contents begins to get low. This disadvantage isentirely avoided by the use of the-small. reservoir b, which may, forinstance, be given a size corresponding to one days consumption of fuelin the lamp.

The lamp evidently need not be of the form shown in the drawings,representing a street lamp, but it may have any suitable form desired.'

reservoir and opening inwardly in respect to the supplemental reservoir,a pipe connecting I 5 I the supplemental reservoir with the burner, agas holder, a reducing valve connected therewith and a pipe connectingthe reducing-valve with the supplemental reservoir.

In witness whereof I have hereunto set my 20 hand in presence of twowitnesses.

SVEN GARLSON.

Witnesses:

H. FELANDER, T. RISBERG.

